Malicious PDF — malware analysis report

Static analysis result for SHA-256 625687bd6abbcc96…

MALICIOUS

PDF

72.4 KB Created: 2021-05-08 14:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 19550a1268007afb39eb147b74044b96 SHA-1: e73fe6e08b2d8195add02d26c26a39a3814491f4 SHA-256: 625687bd6abbcc96cf10742867ee72d16e4ba44c2f893798a6399515a0f28b68
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/strik?utm_term=how+to+do+anointing+oil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499309/normal_606e19bedef50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fd64ec9dc931.pdfIn PDF document text
    • http://lefavapexusa.iblogger.org/monte_carlo_ceiling_fan_owner_s_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_602b5783de10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_602259a72c6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_6029f27929600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_6034dcc3ef4b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_5ff882b09fb38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_60434ffa6ae3f.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/bimufowexopujobep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fdb9aa69cf1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_601dff46314a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_602050cae4bc3.pdfIn PDF document text
    • http://bimoluk.iblogger.org/what_is_the_length_of_land_and_coastal_boundaries_of_india.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/87570867783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79367531-75f5-452b-b559-fe30de5b8276/3517016202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee70acb8-b062-48af-94c1-2d1bdb713488/navy_eval_writing_block_43_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b44f125-f249-43c9-bbeb-094c89a20300/56084899569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db835c4-79bf-4efc-aeb5-2d97b542f6b3/kurawizi.pdfIn PDF document text
    • http://vajitefafuxuz.epizy.com/tivinenijatepijad.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/att_tv_remote_not_turning_on_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8df7c2-d719-4428-b59a-16d549b20a86/does_snapchat_work_with_law_enforcement.pdfIn PDF document text
    • http://taputideletu.rf.gd/haunted_house_craft_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/citizens_bank_financial_analyst_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/reporter_tv_news_readers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 4772 bytes
SHA-256: 1da9e3dab034cf96becadb4c078b9337aa7dfb7e59148952c81dd2ab7577fb31
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 10500 bytes
SHA-256: 97538196c3149e8508182964bbb36fe0882d05da5a75f07e0cc4f2a52d7cd649

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